SV: [PHP] Passing a variable invisibly via a href?

[Daniel Alsén]

 You could use a form and have a hidden vield that contains a value.  The
 user would have to click the submit button for the variable/value to carry
 over though.

I thought about that. But i have two possible values (via two links) that
could be passed and i can´t really get it together. Two forms?

- Daniel


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SV: SV: [PHP] Passing a variable invisibly via a href?

[Daniel Alsén]

 Yes, there is a way to do it without using any forms.  I may be able to
 help you better if you could show me the relevant code -- I'm not sure
 if what I have in mind is really applicable to what you want to do.

It´s not really advanced:

session_start();
session_register('text_size');

if ($change == inc) {
$text_size++;
}
elseif ($change == dec) {
$text_size--;
}

I use the variable $change to set the text size in my stylesheet:

if (isset($text_size)) {echo $text_size;} else {echo 10; $text_size = 10;}

And i set the variable via a link:

a href=? echo $PHP_SELF; ??change=inc (or change=dec)

Now - i don´t want the variable to be visible. And i would prefer if the
variable didn´t get set every time someone hit reload.

Or am i attacking this changing-text-size-thingy the wrong way?

- Daniel


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Re: SV: SV: [PHP] Passing a variable invisibly via a href?

[Erik Price]

On Tuesday, April 2, 2002, at 10:28  AM, Daniel Alsén wrote:

 I use the variable $change to set the text size in my stylesheet:

 if (isset($text_size)) {echo $text_size;} else {echo 10; $text_size = 
 10;}

 And i set the variable via a link:

 a href=? echo $PHP_SELF; ??change=inc (or change=dec)

 Now - i don´t want the variable to be visible. And i would prefer if the
 variable didn´t get set every time someone hit reload.

 Or am i attacking this changing-text-size-thingy the wrong way?

Hmm.  I thought that I had a clever solution for you, but I don't.  The 
one that I came up with would probably be far more complex and inelegant 
than you would ever want to use.  If you were submitting your data to a 
database or some kind of service, then it would work (I am thinking of 
the PostToHost() function in the archives), but since you are trying to 
set a session variable, you really need to refresh the page in the 
process.  This means that either using a form with POST data or the 
querystring method that you mention above is really the best way to do 
it.

If you used a form with POST data, you'd probably want to use radio 
buttons or make a little listbox and a submit button, like:

form method=post action=?php echo $_SERVER['PHP_SELF']; ?
select name=change
  option value=incIncrease Size/option
  option value=decDecrease Size/option
/select
/form

This would keep your querystring/URL free of extra data like 
page.php?change=inc.



Erik




Erik Price
Web Developer Temp
Media Lab, H.H. Brown
[EMAIL PROTECTED]


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